The Arctic Flame Birch is incredible wood.It tactually changes color as you look at the stripes from different angles dark becomes light and light becomes dark. Magical. The fellow that does my reboring has a 9.3x53R (Finnish) reamer.He does excellent work. I am not starting work until late summer though as I have to round up original Sako parts such as sights,cocking piece ,extractor ect.I dont want to harm an original Sako M39 .I was very fortunate to find this rifle as it had already been converted to a sporter with shortened barrel and plastic stock.Even so it took me quite a while because Mannerheims Sako is a 1943 date.